Variety of Web 2.0 Tools and Links (Very Comprehensive Lists-Easy to get lost)

http://cooltoolsforschools.wikispaces.com/ (sorted by type of application you may want to incorporate)
http://webtools4u2use.wikispaces.com/
http://web20guru.wikispaces.com/Web+2.0+Resources
http://www.go2web20.net/

File Sharing (A Real-Time Way for Publishing)

http://drop.io/

Resources/Information

go.grolier.com (Great for in-school use)
http://www.badgerlink.net/ (Particularly - Teaching Books, Novelist K-8, Spanish Encyclopedias, Student Resource Center)
http://www.educationoasis.com/resources/sitesforteachers.htm (Might be a good place to get ideas for a unit)

Standards

http://www.iste.org/AM/Template.cfm?Section=NETS
http://www.corestandards.org/Standards/index.htm